<template>
  <el-container class="home-container">
<!--    头部区域-->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
<!--    页面主体区域-->
    <el-container>
<!--      侧边栏-->
      <el-aside :width="isCollapse?'64px':'200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
<!--router：为整个menu菜单开启路由模式，index属性当做跳转地址-->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409FFF"
          unique-opened
          :collapse=isCollapse
          :collapse-transition="false"
          router
          :default-active=activePath>
<!--          一级菜单-->
          <el-submenu :index=item.id v-for="item in menuList" :key="item.id">
<!--            一级菜单模板区-->
            <template slot="title">
<!--              图标-->
              <i :class=iconList[item.id]></i>
<!--              文本-->
              <span>{{item.authName}}</span>
            </template>
<!--            二级菜单-->
            <el-menu-item :index="'/'+childItem.path"
                          v-for="childItem in item.children"
                          :key="childItem.id" @click="saveNavState('/'+childItem.path)">
              <template slot="title">
                <!--              图标-->
                <i class="el-icon-menu"></i>
                <!--              文本-->
                <span>{{childItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
<!--      右侧主体区-->
      <el-main>
<!--        路由占位符-->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  created() {
    this.getMenuList()
    this.activePath=window.sessionStorage.getItem('activePath')
  },
  name: "Home",
  methods:{
    //二级菜单单击事件，将路由保存起来
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath=activePath
    },
    //点击按钮切换菜单的折叠和展开
    toggleCollapse(){
      this.isCollapse=!this.isCollapse
    },
    logout(){
      window.sessionStorage.clear()
      this.$router.push('/login')
      this.$message.success('退出登录')
    },
    //获取所有的菜单
    getMenuList(){
      this.$http.get('menus').then(({data:res})=>{
        if(res.meta.status!==200) return this.$message.error(res.meta.msg)
        this.menuList=res.data
      })
    }
  },
  data(){
    return{
      //是否折叠，默认 不
      isCollapse:false,
      //被激活的链接地址
      activePath:'',
      //左侧菜单数据
      menuList:[],
      iconList:{
        '125':'el-icon-user-solid',
        '103':'el-icon-s-help',
        '101':'el-icon-s-goods',
        '102':'el-icon-s-order',
        '145':'el-icon-s-marketing'
      }
    }
  }
}
</script>

<style scoped>
.home-container{
  height: 100%;
}
.el-header{
  background-color: #373D41;
  display: flex;
  justify-content:space-between ;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
}
.el-header div{
  display: flex;
  align-items: center;
}
.el-header span{
  margin-left: 15px;
}
.el-aside{
  background-color: #333744;
}
.el-main{
  background-color: #EAEDF1;
}
.el-menu{
  border-right: none;
}
.toggle-button{
  background-color: #4A5064;
  font-size:10px;
  line-height: 24px;
  color: #ffffff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
